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Researchers Find New Way To Build Quantum Computers (reuters.com)
An anonymous reader shares a report: Researchers in Australia have found a new way to build quantum computers which they say would make them dramatically easier and cheaper to produce at scale. Quantum computers promise to harness the strange ability of subatomic particles to exist in more than one state at a time to solve problems that are too complex or time-consuming for existing computers. The team from the University of New South Wales say they have invented a new chip design based on a new type of quantum bit, the basic unit of information in a quantum computer, known as a qubit. The new design would allow for a silicon quantum processor to overcome two limitations of existing designs: the need for atoms to be placed precisely, and allowing them to be placed further apart and still be coupled. Crucially, says project leader Andrea Mello, this so-called "flip-flop qubit" means the chips can be produced using the same device technology as existing computer chips.
Turns out, you can do that with LEGO bricks!
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There's no way of knowing if one's been left on the floor until you stand on it.
systemd is Roko's Basilisk.
From what I've read, they have an idea, but they haven't actually built one of these yet.
So this is - at present anyway - just handwaving.
I've fallen off your lawn, and I can't get up.
I thought this was going to involve cats in boxes.
Better known as 318230.
https://www.eurekalert.org/pub...
It sounds like what they did is change from magnetic controls to electric controls for manipulating and reading the quantum state of a phosphorous atom. Apparently they can use an electron to actuate spin changes which ripple to the P atom and allow for larger coupling distances. I'm guessing this is what allows them to more easily embed the qubit in silicon. Interesting but I'd still like to see a prototype.
FYI paper already published. Here's the final paper link , and the pre-print...
Abstract
Practical quantum computers require a large network of highly coherent qubits, interconnected in a design robust against errors. Donor spins in silicon provide state-of-the-art coherence and quantum gate fidelities, in a platform adapted from industrial semiconductor processing. Here we present a scalable design for a silicon quantum processor that does not require precise donor placement and leaves ample space for the routing of interconnects and readout devices. We introduce the flip-flop qubit, a combination of the electron-nuclear spin states of a phosphorus donor that can be controlled by microwave electric fields. Two-qubit gates exploit a second-order electric dipole-dipole interaction, allowing selective coupling beyond the nearest-neighbor, at separations of hundreds of nanometers, while microwave resonators can extend the entanglement to macroscopic distances. We predict gate fidelities within fault-tolerance thresholds using realistic noise models. This design provides a realizable blueprint for scalable spin-based quantum computers in silicon.
Of course they haven't built it yet, so you never know...
That, or Schrodinger's cat allows for Schrodinger's rats.
I don't believe in karma, I just call it like I see it.